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// Copyright Epic Games, Inc. All Rights Reserved.
#pragma once
#include <zencore/compositebuffer.h>
#include <zencore/string.h>
#include <zencore/trace.h>
#include <zenhttp/httpclient.h>
namespace zen {
using namespace std::literals;
class HttpClientBase
{
public:
HttpClientBase(std::string_view BaseUri, const HttpClientSettings& Connectionsettings, std::function<bool()>&& CheckIfAbortFunction);
virtual ~HttpClientBase() = 0;
using Response = HttpClient::Response;
using KeyValueMap = HttpClient::KeyValueMap;
[[nodiscard]] virtual Response Put(std::string_view Url, const IoBuffer& Payload, const KeyValueMap& AdditionalHeader = {}) = 0;
[[nodiscard]] virtual Response Put(std::string_view Url, const KeyValueMap& Parameters = {}) = 0;
[[nodiscard]] virtual Response Get(std::string_view Url,
const KeyValueMap& AdditionalHeader = {},
const KeyValueMap& Parameters = {}) = 0;
[[nodiscard]] virtual Response Head(std::string_view Url, const KeyValueMap& AdditionalHeader = {}) = 0;
[[nodiscard]] virtual Response Delete(std::string_view Url, const KeyValueMap& AdditionalHeader = {}) = 0;
[[nodiscard]] virtual Response Post(std::string_view Url,
const KeyValueMap& AdditionalHeader = {},
const KeyValueMap& Parameters = {}) = 0;
[[nodiscard]] virtual Response Post(std::string_view Url, const IoBuffer& Payload, const KeyValueMap& AdditionalHeader = {}) = 0;
[[nodiscard]] virtual Response Post(std::string_view Url,
const IoBuffer& Payload,
ZenContentType ContentType,
const KeyValueMap& AdditionalHeader = {}) = 0;
[[nodiscard]] virtual Response Post(std::string_view Url, CbObject Payload, const KeyValueMap& AdditionalHeader = {}) = 0;
[[nodiscard]] virtual Response Post(std::string_view Url, CbPackage Payload, const KeyValueMap& AdditionalHeader = {}) = 0;
[[nodiscard]] virtual Response Post(std::string_view Url,
const CompositeBuffer& Payload,
ZenContentType ContentType,
const KeyValueMap& AdditionalHeader = {}) = 0;
[[nodiscard]] virtual Response Upload(std::string_view Url, const IoBuffer& Payload, const KeyValueMap& AdditionalHeader = {}) = 0;
[[nodiscard]] virtual Response Upload(std::string_view Url,
const CompositeBuffer& Payload,
ZenContentType ContentType,
const KeyValueMap& AdditionalHeader = {}) = 0;
[[nodiscard]] virtual Response Download(std::string_view Url,
const std::filesystem::path& TempFolderPath,
const KeyValueMap& AdditionalHeader = {}) = 0;
[[nodiscard]] virtual Response TransactPackage(std::string_view Url, CbPackage Package, const KeyValueMap& AdditionalHeader = {}) = 0;
LoggerRef Log() { return m_Log; }
std::string_view GetBaseUri() const { return m_BaseUri; }
std::string_view GetSessionId() const { return m_SessionId; }
bool Authenticate();
protected:
LoggerRef m_Log;
std::string m_BaseUri;
std::string m_SessionId;
const HttpClientSettings m_ConnectionSettings;
std::function<bool()> m_CheckIfAbortFunction;
const std::optional<HttpClientAccessToken> GetAccessToken();
RwLock m_AccessTokenLock;
HttpClientAccessToken m_CachedAccessToken;
};
namespace detail {
class TempPayloadFile
{
public:
TempPayloadFile(const TempPayloadFile&) = delete;
TempPayloadFile& operator=(const TempPayloadFile&) = delete;
TempPayloadFile();
~TempPayloadFile();
std::error_code Open(const std::filesystem::path& TempFolderPath, uint64_t FinalSize);
std::error_code Write(std::string_view DataString);
IoBuffer DetachToIoBuffer();
IoBuffer BorrowIoBuffer();
inline uint64_t GetSize() const { return m_WriteOffset + m_CacheBufferOffset; }
void ResetWritePos(uint64_t WriteOffset);
private:
std::error_code Flush();
std::error_code AppendData(const void* Data, uint64_t Size);
void* m_FileHandle;
std::uint64_t m_WriteOffset;
static constexpr uint64_t CacheBufferSize = 512u * 1024u;
uint8_t m_CacheBuffer[CacheBufferSize];
std::uint64_t m_CacheBufferOffset = 0;
};
class BufferedReadFileStream
{
public:
BufferedReadFileStream(const BufferedReadFileStream&) = delete;
BufferedReadFileStream& operator=(const BufferedReadFileStream&) = delete;
BufferedReadFileStream(void* FileHandle, uint64_t FileOffset, uint64_t FileSize, uint64_t BufferSize);
~BufferedReadFileStream();
void Read(void* Data, uint64_t Size);
private:
void Read(void* Data, uint64_t BytesToRead, uint64_t FileOffset);
void* m_FileHandle = nullptr;
const uint64_t m_FileSize = 0;
const uint64_t m_FileEnd = 0;
uint64_t m_BufferSize = 0;
uint8_t* m_Buffer = nullptr;
uint64_t m_BufferStart = 0;
uint64_t m_BufferEnd = 0;
uint64_t m_FileOffset = 0;
};
class CompositeBufferReadStream
{
public:
CompositeBufferReadStream(const CompositeBufferReadStream&) = delete;
CompositeBufferReadStream& operator=(const CompositeBufferReadStream&) = delete;
CompositeBufferReadStream(const CompositeBuffer& Data, uint64_t BufferSize);
uint64_t Read(void* Data, uint64_t Size);
private:
const CompositeBuffer& m_Data;
const uint64_t m_BufferSize;
size_t m_SegmentIndex;
std::unique_ptr<BufferedReadFileStream> m_SegmentDiskBuffer;
MemoryView m_SegmentMemoryBuffer;
uint64_t m_BytesLeftInSegment;
};
class IncrementalStringMatcher
{
public:
enum class EMatchState
{
None,
Partial,
Complete
};
EMatchState MatchState = EMatchState::None;
IncrementalStringMatcher() {}
IncrementalStringMatcher(std::string&& InMatchString) : MatchString(std::move(InMatchString)) {}
void Init(std::string&& InMatchString) { MatchString = std::move(InMatchString); }
void Reset()
{
MatchLength = 0;
MatchStartOffset = 0;
MatchState = EMatchState::None;
}
inline uint64_t GetMatchEndOffset() const
{
if (MatchState == EMatchState::Complete)
{
return MatchStartOffset + MatchString.length();
}
return 0;
}
inline uint64_t GetMatchStartOffset() const
{
ZEN_ASSERT(MatchState == EMatchState::Complete);
return MatchStartOffset;
}
void Match(uint64_t Offset, char C)
{
ZEN_ASSERT_SLOW(!MatchString.empty());
if (MatchState == EMatchState::Complete)
{
Reset();
}
if (C == MatchString[MatchLength])
{
if (MatchLength == 0)
{
MatchStartOffset = Offset;
}
MatchLength++;
if (MatchLength == MatchString.length())
{
MatchState = EMatchState::Complete;
}
else
{
MatchState = EMatchState::Partial;
}
}
else if (MatchLength != 0)
{
Reset();
Match(Offset, C);
}
else
{
Reset();
}
}
inline const std::string& GetMatchString() const { return MatchString; }
private:
std::string MatchString;
uint64_t MatchLength = 0;
uint64_t MatchStartOffset = 0;
};
class MultipartBoundaryParser
{
public:
std::vector<HttpClient::Response::MultipartBoundary> Boundaries;
MultipartBoundaryParser();
bool Init(const std::string_view ContentTypeHeaderValue);
inline void ParseInput(std::string_view data) { InternalParseInput(data); }
private:
IncrementalStringMatcher BoundaryBeginMatcher;
IncrementalStringMatcher BoundaryEndMatcher;
IncrementalStringMatcher HeaderEndMatcher;
ExtendableStringBuilder<64> BoundaryHeader;
uint64_t PayloadOffset = 0;
void InternalParseInput(std::string_view data);
};
std::pair<std::string_view, std::string_view> GetHeaderKeyAndValue(std::string_view HeaderString);
std::pair<uint64_t, uint64_t> ParseContentRange(std::string_view Value);
} // namespace detail
} // namespace zen
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